Characterization of tantalum oxide-ruthenium oxide hybrid capacitors
Tzu-Yen Chang
Xu Wang
Evans, D.A.
Roberson, S.L.
Zheng, J.P.
Dept. of Electr. & Comput. Eng., Florida A&M Univ., Tallahassee, FL, USA;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: Dec. 2004
Volume: 51,
Issue: 6
On page(s): 1313- 1317
ISSN: 0278-0046
INSPEC Accession Number: 8201276
Digital Object Identifier: 10.1109/TIE.2004.837900
Current Version Published: 2004-11-22
Abstract
The ac and dc performance and leakage current of Evans tantalum oxide-ruthenium oxide hybrid capacitors were characterized at room temperature. The RC time constants were in the range from 2 to 0.45 ms and dependent on the maximum operational voltage of the capacitor. The gravimetric and volumetric energy densities of hybrid capacitors were in the range of 0.074-0.233 J/g and 0.388-1.384 J/cm3, respectively. The gravimetric and volumetric power densities of hybrid capacitors were in the range of 19-259 W/g and 100-1540 W/cm3, respectively. A comparison of the performance between hybrid capacitors to conventional aluminum and tantalum electrolytic capacitors is made in this paper.
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